Question

solve it step by step
​

Answer 1

Explanation:

We know,

refractive index = 1/sinC

where 'C' is critical angle

So, refractive index = 1/sin45

= sqrt( 2 )

We also have refractive index = speed of light in vacuum ÷ speed of light any medium

So, speed of light any medium = speed of light in vacuum ÷ refractive index

speed of light any medium = 3 × 10^8 ÷ sqrt( 2 )

= 2.12 × 10^8 m/s

Answer 2

Answer:

hope it helps u dear, plz mark me as brainliest